//Copyright 2008 Kristian Gundry And Rune Juhl-Petersen
//This file is part of Plain.

//Plain is free software: you can redistribute it and/or modify
//it under the terms of the GNU Lesser General Public License as published by
//the Free Software Foundation, either version 3 of the License, or
//any later version.

//Plain is distributed in the hope that it will be useful,
//but WITHOUT ANY WARRANTY; without even the implied warranty of
//MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//GNU Lesser General Public License for more details.

//You should have received a copy of the GNU Lesser General Public License
//along with Plain.  If not, see <http://www.gnu.org/licenses/>.
using System;
using System.Collections.Generic;
using System.Text;
using System.Collections;

namespace Plain.Data
{
	/// <summary>
	/// Data Access Object
	/// </summary>
    /// <typeparam name="T">Specifies the type (T), the dao can handle</typeparam>
    /// <typeparam name="TT">Specifies the type (TT), of the identifier for the type T</typeparam>
	public interface IDao<T,TT> where T:IBusinessEntity<TT>{

		/// <summary>
		/// Saves the entity 
		/// </summary>
		/// <param name="entity">Entity to save</param>
		/// <returns>The entity</returns>        
		TT Save(T entity);

		/// <summary>
		/// Get the entity identified by <paramref name="id"/>
		/// </summary>
		/// <param name="id">The id of the entity to get</param>
		/// <returns>The entity</returns>        
		T Get(TT id);

        ///<summary>
        ///Delete the entity
        ///</summary>
        ///<param name="entity">Entity to delete</param>        
        void Delete(T entity);

		/// <summary>
		/// Return all entities in storage
		/// </summary>
		/// <returns>Ilist of entities</returns>        
		IList<T> GetAll();
	}
}
